Compare software

Yellow Lab Tools vs Experte Page Speed Test: catalog facts
Yellow Lab Tools	Experte Page Speed Test
Free Free and open source under the GPL-2.0 licence.	Free Free to use online.
Web, Self-hosted, Command line	Web
Checks front-end code quality as well as speed Detailed explanations of each issue	Tests many pages in one run Crawl, URL list or keyword-based modes
Development has slowed, with the last repository push in early 2024 Docker image is maintained by a third party	Crawls are capped at 60 seconds and 500 URLs Lab scores only, not real-user data
Downloadable app, Web application, Self-hosted	Web application
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.